Perhaps you should try some spelling variations:
van khanh » van thanh, van hanh, van anh
van nhanh » van thanh, van hanh, van nhan
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
te sach » toc sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
cac xuc » cam xuc, chat xuc, cac cuoc
hieu ve » hieu va, hieu van
nang ro » nang co, nang ho, nang ra
ro hai » co hai, o hai, so hai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky nang ro hai. hieu ve ((cac xuc) OR (cac nuoc)) ((van nhanh) or (van khanh)) tri cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ro hai. hieu ve ((cac xuc) OR (cac nuoc)) ((van nhanh) OR (van khanh)) tri cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ro hai. hieu ve ((cac xuc) OR (cac nuoc)) ((van nhanh) or (van khanh)) tri cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ro hai. hieu ve ((cac xuc) OR (cac nuoc)) ((van nhanh) or (van khanh)) tri cua tre*.